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Questions regarding FAV
I would be interested in using an Aquamist FAV, but not a complete Aquamist system.
Thus, I have some questions regarding use of the valve. Car specs: 1985 Pontiac Fiero 3.2L V6 turbo, non-intercooled MegaSquirt 2 programmable fuel injection (controlling the FAV directly) Injection 5" from the intake valves, via 6 check-valved nozzles Pressurized water/methanol tank (compressed air) (not sure I trust those diaphragm pumps) From the FAV web page, it says: "Always use 99% methanol". Is it acceptable to use the FAV with water? With regards to hydrocarbons, is the FAV really that sensitive? If I am drilling/tapping the water/methanol reservoir, will even cutting fluid residues damage the FAV? How do I choose between the 1300 cc and 1600 cc FAV for my application? What are the differences? I have read this thread: http://www.aquamist.co.uk/forum2/vbu...ead.php?t=2922 what limits the PWM frequency to 30 Hz? I was thinking of controlling the FAV like a standard port injector; one pulse per two crankshaft revolutions. However, with a 6000 RPM redline, the valve would be working at 50 Hz. Is the opening time a limiting factor? If I use a peak-and-hold driver, can I reduce the opening time? Can I clamp to a voltage higher than 75 V to close the FAV faster? Is the speed of the FAV influenced by the supply pressure? ...and not really FAV-specific, but more generally regarding water injection: From the HFS3-v3.1 page, I saw the following recommendation: "100% water: 10-15% water/fuel ratio or 0-5-1cc per BHP" From NACA Report 756 Low octance fuel: tested up to 1.5 water/fuel with good results High octane fuel: tested up to 0.6 water/fuel with good results Why do you recommend such low water flow compared to Report 756? |
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